virtual SetData * copy () const Copy this object.virtual bool instanceOf (int classNo) const Is this instance of some class?virtual void iterate (int &current_class, std::string &attr) const Iterate over the attributes of this instance.virtual void free ()Free an instance of this class, returning it to the memory pool.virtual SetData * getDefaultObject ()Get the reference object that contains the default values for attributes of instances of the same class as this object.

.This is base operation for all other operations and defines basic attributes. You can use this as starting point for browsing whole operation hiearchy. refno refers to operation this is reply for. In examples all attributes that are just as examples (and thus world specific) are started with 'e_'.